Currently all widebody fleets are overcrewed with captains, flying as little as 500 hrs a year. So we will not see any upgrades nor DECs on widebody for some time to come.
The only chance would be B787, but currently the plan is to hire on A320 and move experienced A320 guys onto the B787.
I reckon that is partly due to the fact that they need some kind of carrot for the A320 folks not to run away all to quickly.